2100321320 has 16 divisors (see below), whose sum is σ = 4725723060. Its totient is φ = 840128512.

The previous prime is 2100321257. The next prime is 2100321323. The reversal of 2100321320 is 231230012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1942517476 + 157803844 = 44074^2 + 12562^2 .

It is a super-2 number, since 2×2100321320² = 8822699294493084800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100321295 and 2100321304.

It is not an unprimeable number, because it can be changed into a prime (2100321323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26253977 + ... + 26254056.

Almost surely, 2^2100321320 is an apocalyptic number.

2100321320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100321320 is an abundant number, since it is smaller than the sum of its proper divisors (2625401740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100321320 is a wasteful number, since it uses less digits than its factorization.

2100321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52508044 (or 52508040 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2100321320 is about 45829.2627040846. The cubic root of 2100321320 is about 1280.6444752593.

Adding to 2100321320 its reverse (231230012), we get a palindrome (2331551332).

The spelling of 2100321320 in words is "two billion, one hundred million, three hundred twenty-one thousand, three hundred twenty".